Remodelers have an obligation — both legal and ethical — to protect workers and clients from the hazards of lead-based paint. A research scientist specializing in environmental health offers practical guidelines for reducing this risk on the job site.

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Q&A

Q: We are faced with a site for a 1,400-square-foot, story-and-a-half house in a northern climate with a 6-foot frost depth. We propose to build the house on a slab-on-grade foundation, some of which will be near ledge. Does the footing for such a slab have to extend below the 6-foot frost depth...